<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <button id="btn">按钮</button>
    <script>
      const btn = document.getElementById('btn')
      btn.onclick = async function () {
        const response = await fetch('http://localhost:5000/b', {
          method: 'post',
          body: JSON.stringify({
            name: 123,
          }),
          headers: {
            //设置请求头
            'content-type': 'application/json',
          },
        })
        console.log(response)
        const data = await response.json()
        console.log(data)
      }
    </script>
  </body>
</html>
